I was reading through this Advanced Linux Programming tutorial when I encountered a problem. I was trying to eject the CD-ROM drive using this code: Then I try to compile this code and get the following output: So what am I doing wrong? Answer The error message you're seeing looks like something is wrong in your #include lines, not with

How to eject the CD Drive on Linux using C?

I was reading through this Advanced Linux Programming tutorial when I encountered a problem. I was trying to eject the CD-ROM drive using this code:

int fd = open(path_to_cdrom, O_RDONLY);

// Eject the CD-ROM drive
ioctl(fd, CDROMEJECT);

close(fd);

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int fd = open(path_to_cdrom, O_RDONLY);​// Eject the CD-ROM driveioctl(fd, CDROMEJECT);​close(fd);​

Then I try to compile this code and get the following output:

In file included from /usr/include/linux/cdrom.h:14,
                 from new.c:2:
/usr/include/asm/byteorder.h: In function ‘___arch__swab32’:
/usr/include/asm/byteorder.h:19: error: expected ‘)’ before ‘:’ token
/usr/include/asm/byteorder.h: In function ‘___arch__swab64’:
/usr/include/asm/byteorder.h:43: error: expected ‘)’ before ‘:’ token

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In file included from /usr/include/linux/cdrom.h:14,                 from new.c:2:/usr/include/asm/byteorder.h: In function ‘___arch__swab32’:/usr/include/asm/byteorder.h:19: error: expected ‘)’ before ‘:’ token/usr/include/asm/byteorder.h: In function ‘___arch__swab64’:/usr/include/asm/byteorder.h:43: error: expected ‘)’ before ‘:’ token​

So what am I doing wrong?

Answer

The error message you’re seeing looks like something is wrong in your #include lines, not with the code you posted. I tried compiling http://www.advancedlinuxprogramming.com/listings/chapter-6/cdrom-eject.c and it compiles just fine.

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